Paper machinp



Jan. 17, 1928.

H. D. BEAN PAPER MACHINE Filed June 1926 2 Sheets- Sheet 1 INVENTORARRKQBEAN I A l ATTOBN Y5 Jan. 17', 1928.

H. D. BEAN PAPER MACHINE 2 Sheets-Sheet 2 Filed June 1926 HARRYD-BEANATTORJZZS m Patented Jan. 17, 1928';

HAnRYn BEAN, or MONTREAL wnsr, QUEBEC, CANADA.

rerun MACHINE.

' Application filed June '14:, 1926. ,-Seria1 No. 115,967. I

This invention relates to paper making machines in which the paper iscarried alternately over heated drierrolls and guide rolls, as'it'passes through the machine, and the object of the invention is toprovide a machine having a new and improved drier section which willgreatly facilitate the drying of paper in moreeflicient manner than withmachines at present employed for this purpose; 1 I L f Another objectisto provide a machine of simple construction which will takecomparatively little floor space and at the same time provide means toallow largevolumes of air to circulate freely over and between therolls, over both surfaces of the paper, and through the machine and thusreduce the time usually taken to dry paper. I

A further object is to provide a drying machine in which-the paper maybeeasily inspected while it passesthrough the machine. Y i

In my invention I provide a plurality of drier units, each unitcomprising a frame having a plurality of drier rolls jrotatably mountedtl1erein,-and arranged in vertically disposed relation. ,Also, mountedin the frame area plurality of guide rollsso positioned thatflthey holdthe paperin maximum circumferential contact with the faces of the drierrolls. Some of the guide rolls are arranged in proximity to thedrierrolls and are provided with suction boxes to withdraw the moisturereleased from the paper and the felt through contact with the] drierrolls. Means are also provided in the machine toinduce a circulation ofair therethrough and prevent air pockets from forming therein.

In the drawi of my invention; Figure 1 is a diagrammatic side elevationof one section of the machine showing my ngs which illustrate one formpreferred.arrangement ofthe guide, drier,

and suctionrollsi. a 1

Figure. 2 is'la side elevation of the drier frame.

Figure 3'is an end elevation of one of the units showing means. forcirculating air through the machine.

' Figure 4 is aside elevation of a plurality ofd'rier units, inassembled relation.

Flgure 5 is a perspective View of one of the suction guide rolls.

Referring more particularly to the draw";

terior of the roll.

Tings, 11. designates the side frames of the drier section of. themachine, and 12 the drier rolls which are rotatably mounted in thebearings 13 formed in the frame. The drier rolls are arranged invertically dis.-

posed parallel rows, and may be of the usual type employed in this art,that is connected to a source'of heat in such a manner that the heatingagent will pass throughithe in- Rotatably mounted in suitable bearings14 formed in the frame, are the guide rolls 15 and suction guide rolls 16,.which are mounted in pairs in close proximity to each drier roll sothat the paper sheet 17 in passing through the machine in the directionindicated by arrows is held in maximum circumferential contact with thefaces of the drier rolls. The guide roll bearings are formed in rowsparallel to the rows of bearings supporting the drier rolls. The suctionrolls 16 are of the perforated type shown in Figure 5 and are eachprovided with a suction box 18, the upper edges 19 of which may beprovided witha sealing medium 20 contacting with the inner surface 21.The suction boxes are station- "ary within the roll and the perforatedshell 22 is so mounted that it rotates independently of the suction boxin the manner well known in this art. Felt supporting rolls 23 are alsoprovided to guide the felts 24 over theupper end of the section of themachine.

The felts which are of the endless type pass over rolls 25 at thebottom, said rolls being mounted to allow adjustments tobe made tothefelts to tighten same in the well known manner.- Extending across theframe-parallel to the rolls and positioned at the bottomvofthe frame, isthe perforated pipe 25- through which air may be blown to circus latethrough the section and between the rows ofdrier rolls. Between eachpair of drier rolls are the pipes 26, which may be connected to ablower, not shown. The pipes 26"are provided'with perforations or slots27 adaptedto direct air blown through said pipes towards the centre ofthe machine to induce a circulation of air away from the pockets formedbetween the felts, drier rolls, and theadjacent guide rolls.

Mounted above each section ofthe machine is the ventilator 28 which isbuilt in twosections 29 and 30, spaced from one another, the section 29being provided with an air outlet pipe 31. The laser-ed es 32 of thesection 29 extend downwardly over the upperjpart of the frame and arespaced therefrom to allow the air to pass freely through the machine andbetween the sections of the ventilator to the outletpipe. The sections30" of the ventilators are of the louver type and are arrangedparallelyto the upwardly tapering wall 33 of the section 29. r

In operation the paper enters the drier section at the point marked 31,over a guide roll 15 and around the drier roll, partially around-thesuction roll in the direction indicated by the arrows. The paper sheetis supported on the endless felt which are driven through frictionalcontact with the drier rolls which may be driven in any suitable mannerfrom a source, not shown. The paper in passing through the drier sectionis alternately subjected to the drying action of the heated drier rollsand to suction guide rolls, so that moisture absorbed by the feltthrough the drying of the paper sheet in passing over the drier rolls,is drawn into the suction rolls. Air is circulated through the machineby means of the blower pipes and is drawn through the ventilatorspositioned above-each section. In the drawings,

three sections are shown, each section consisting. of eight rolls, butit will be readily understood that the number of sections and also thenumber of rolls in each section, may be modified according torequirei'nents.

A drier section built in the manner herein disclosed, that is with acombination of heated and suction drier rolls, greatly reduces the timetaken vto dry paper as it comes from the wet end of a paper machine,when compared with the time taken when only heated rolls are used.Another feature is that a machine arranged in vertically dis- I posedparallel rows of rolls takes up less space thangthe usual machine inwhich two horizontally disposed rows of rolls are used, and in whichdifiiculty is encountered in oreating'a circulation of air within thedrier, a feature overcome by the construction detailed herein; By usingsuction rolls in con- .unction with the heated rolls the number of rollsrequired in a machine of this class is greatly reduced when comparedwith the ordinary type of drier.

Having thus described my what I claim is i' 1. In a drier section of apaper making machine, a frame, a plurality of heated drier rollsrotatably mounted in the frame,- a plurality of suction rolls rotatably'mounted in the frame and an endless paper carrying felt contacting withthe heated and the suction rolls as itpasses through the section.

2.-I1i a drier section of a paper making machine, a frame, a pluralityof heated rolls rotatably mounted therein, a plurality of suction rollsalso rotatably mounted in the invention,

frame, one between each pair of heated rolls and'an endless papercarrying felt passing alternately over one heated and one suction rollthroughout the machine.

3; In a drier section-of a paper making machine, a frame, a plurality ofheated drier rolls, rotatably mounted therein, a plurality of guiderolls also rotatably mounted in the frame, some of the guide rolls beingplain and the remainder-being provided with internally disposed suctionboxes, said guide rolls being; mounted in pairs, one lain and onesuction roll to each heated drier r011 said guide rolls beingsopositioned that they will hold paper passing through the machine incircumferential contactwith the d rier' rolls.

4. In a paper drier section, a frame, a plurality of heated drier rollsrotatal'aly mounted therein, a plurality of guide rolls also rotatablymounted in the frame in proximity to the h ated rolls and. in pairs, onepair toeach heated roll, one roll of each pair being perforatedandprovided with a fixed suction therein, and a paper carrying feltthreaded through the machine contacting successively with one guide, (meheated and one suction roll as it passes through the machine. r

5. In a paper drying unit, a frame, a plurality of vertically disposedrows of spaced heated drier rolls, rotatably mounted in the frame,aplurality of vertically disposed rows of guide rolls rotatably mountedin the frame, a pair of guide rolls to each heated roll and so mountedthat they will hold paper in maximum 'circuni'ferential contact with theheated rolls as it passes through the machine, one-of each pair of guideiolls being provided with a perforated shell and a stationary suctionbox, and anendless paper carrying means contacting succes= sively with aplain guide roll and a heated drier roll and asuc'tion' roll, as itpasses through the machine.

6. In a paper drying unit, a frame, two parallel vertically disposedrows of heated drier rolls rota-tably mounted in theframe, two parallelrows of guide rolls also rotatably mounted in the frame, and inproximity to the heated rolls, said guide rolls being arranged in pairs,one pair to each heated roll, and one of each pair being provided with aperforated shell and a stationary suction box, an endless felt passingsuccessively over a plain guide roll a heated roll and a suction roll asit passes through the machine, means to. support the'felt as it ispassing from one row'of rolls to the other row of rolls, andmeansadjustably mounted at the bottom of the frame to sup,-

port the felt and to allow easy adjustment thereof. V

. 7. In a paper dryingunit, a frame, two parallel vertically disposedrows of heated a pair of guide rolls rotatably mounted in the frame inproximity to each drier roll,

one of each pair of rolls being provided with a perforated shell and asuction box fixed within the said shell, a paper supporting felt of theendless type passing successively over a plain guide roll, a heated rolland a suction roll in vertically inclined passage through the machine,means to support the felt as it passes from one row of drier rolls tothe other row at the top of the machine, means to support and allowadjustment of the felt, at the bottom of the machine, and means tocirculate air through the machine.

8. A paper drying unit according to claim 7, having the air circulatingmeans between each pair of heated rolls and in proximity to the guiderolls.

' 9. A paper drying unit according to claim 7 having a ventilatorpositioned above the frame, said ventilator comprising spaced sectionstapering towards the centre of the machine, one of said sections beingof the louver type and the other of the closed type terminating in anair outlet pipe. p

10. Apparatus for drying paper comprising a plurality of alternatelyarranged and rotatably mounted heating and suction rolls over which awet web of paper is adapted to pass and suction means other than saidrolls for drawing off the moistened air in the vicinity of the paper.

In witness whereof, I have hereunto set my hand.

HARRY D. BEAN.

